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ZapSign and Adobe Reader validation

In addition to using ZapSign's Authenticity Checker, you can also validate the integrity of documents in Adobe Reader.

Documents signed at ZapSign are certified by ZapSign with a A1 ICP-Brasil digital certificate, providing an additional layer of proof of the document's integrity.

Adobe Reader validation

The Adobe Reader software does not recognize by default the signatures carried out by the A1 Digital Certificates issued by ICP-Brasil.

For this reason, Adobe Reader software may alert the user that ZapSign's signature is invalid or unknown.

To resolve the issue, it is necessary to import and define as one of the trusted sources of your Adobe Reader the chain of certificates of the Certisign Certifying Authority.

Attention: The following step-by-step is only an optional configuration of the Adobe Reader installed on your computer. Regardless, the ZapSign document is properly signed and its integrity is guaranteed. The message reported by Adobe Reader is only due to the lack of Certisign certificate chain in your Adobe. If you don't want to follow the step-by-step procedure, please validate your document on ZapSign's Checker.

Step-by-step instructions for configuring your Adobe Reader:

1. Download the certificate chain of the Certisign G7 Multiple Certification Authority by clicking here or through the link http://icp-brasil.certisign.com.br/repositorio/ac_certisign_multipla.html

2. Import the certificate into Adobe Reader

Open Adobe Reader and click on "Edit" and "Preferences"

In the left menu, click on "Trusted Certificates" and select "Import"

Passo 1 Validação Adobe Reader

In the "Contacts" section, click "Browse..." and select the file you downloaded in step 1

Passo 2 Validação Adobe Reader

In the "Contacts" section, click on the "Certisign Certification Authority" item that appeared. Then, in the "Certificates" section, click on the item that also appeared with the name "Certificate Authority Certisign"

Passo 3 Validação Adobe Reader

Click on "Trust..." and enable the option "Use this certificate as a trusted root" and click "OK"

Passo 4 Validação Adobe Reader

Click OK and close all windows. Restart Adobe Reader and open a document signed using ZapSign.

Passo 5 Validação Adobe Reader

Finally, click on "Import".

Click OK and close all windows. Restart Adobe Reader and open a document signed using ZapSign.

Done! Your Adobe is now configured and ready to correctly validate signatures based on certificates issued by entities subordinate to the Brazilian Root Certification Authority. The result should look like this:

Passo 6 Validação Adobe Reader